-89.84% is the change from 797 to 81
Calculation steps:
[( 81 - 797 ) ÷ 797] x 100 = -89.84%
Formula
Percentage change = [(81 - 797) / 797] x 100
Subtract the new number by the original number
81 - 797 = -716
-716 ÷ 797 = -0.8983688833124216
-0.8983688833124216 x 100 = -89.84%